Liquid metal battery electrolyte salt forming device

Abstract

The utility model provides a liquid metal battery electrolyte salt forming device, which relates to the field of energy storage batteries and comprises an anode current collector and a containing groove with an opening at the upper end, and the containing groove is used for containing electrolyte salt melt. The mold is arranged in the accommodating groove; the at least two hanging lugs are fixed on the outer edge of the upper end of the mold at intervals and are used for being fixed with the upper end of the positive electrode current collector; the funnel is fixed to the outer side of the mold, an outlet of the funnel is located between the outer side wall of the mold and the inner side wall of the containing groove, and the funnel is used for filling electrolyte salt melt. The electrolyte salt melt is added through the funnel, no electrolyte is splashed out, the electrolyte formed through the mold is regular in shape, and no interference is generated when the electrolyte is assembled with a negative electrode current collector. And after the electrolyte is formed, the cathode metal of the cathode current collector cannot be in contact with the high-temperature liquid electrolyte to melt and flow out in the subsequent assembly process, and the battery stability is high. The electrolyte can be assembled with the negative electrode current collector at any time after being formed, and is not limited by the forming time of electrolyte salt melt.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to a liquid metal battery electrolyte salt forming device. Background Art

[0002] As a new type of energy storage battery, liquid metal battery has great application potential in the field of large-scale energy storage due to its advantages such as long life, low cost and simple structure. Its main components are positive electrode material, negative electrode material, current collector, electrolyte and battery shell. From top to bottom, it consists of negative electrode metal (or alloy) adsorbed in nickel-iron foam, molten salt electrolyte and positive electrode metal (or alloy). Due to the different densities and insoluble properties of the three, the battery will spontaneously divide into three layers.

[0003] At present, the main preparation process of liquid metal batteries is as follows: S1, place one or more positive electrode metals together in a graphite crucible; S2, heat and keep warm to form an alloy in the graphite crucible, and place the graphite crucible in a battery shell of a matching size after cooling; S3, heat and melt the dry and anhydrous electrolyte salt, and pour it into the graphite crucible; S4, assemble the negative electrode current collector adsorbed with the negative electrode metal and the battery top cover to the battery shell; S5, package and weld and connect the leads to obtain a liquid metal battery. In step S3 of this preparation process, the electrolyte salt is directly heated and melted and then poured into the graphite crucible. On the one hand, there is a problem that the electrolyte is easy to splash out, and on the other hand, the assembly of the negative electrode current collector after the electrolyte is formed is prone to interference, which affects the stability of the battery. Utility Model Content

[0004] In view of this, an embodiment of the utility model provides a liquid metal battery electrolyte salt molding device, which aims to solve the problems of easy splashing of electrolyte in the existing liquid metal preparation process and easy interference when assembling the negative electrode current collector after the electrolyte is molded.

[0005] The embodiment of the utility model provides a liquid metal battery electrolyte salt forming device, comprising:

[0006] A positive electrode current collector is provided with a receiving tank with an upper opening, wherein the receiving tank is used to contain an electrolyte salt melt;

[0007] A mold, disposed in the receiving tank;

[0008] At least two hanging ears are fixed at intervals on the outer edge of the upper end of the mold, and are used to be fixed to the upper end of the positive electrode current collector; and

[0009] A funnel is fixed on the outside of the mold, an outlet of the funnel is located between the outer wall of the mold and the inner wall of the containing tank, and the funnel is used to fill the electrolyte salt melt.

[0010] Furthermore, the mold is hollow and is used to be filled with cooling liquid.

[0011] Furthermore, an upper end of the inner side wall of the accommodating groove is provided with an overlap surface concave outwardly, and the overlap surface is used to receive the hanging ear.

[0012] Furthermore, a plurality of positioning grooves are recessed downwardly on the upper end surface of the side wall of the accommodating groove, and the plurality of positioning grooves correspond to the hanging ears one by one.

[0013] Furthermore, the top surface of the hanging ear is not lower than the top surface of the positive electrode current collector.

[0014] Furthermore, the shapes of the mold and the positive electrode current collector are matched.

[0015] Furthermore, the funnel is made of graphite or stainless steel.

[0016] Furthermore, a handle is fixed on the top of the mold.

[0017] Furthermore, one end of the hanging ear is welded and fixed to the outer edge of the upper end of the mold.

[0018] The beneficial effects of the technical solution provided by the embodiment of the utility model are as follows: the liquid metal battery electrolyte salt molding device of the utility model is applied in the positive electrode current collector, the mold is placed in the receiving tank of the positive electrode current collector, the mold is fixed to the upper end of the positive electrode current collector by the hanging ear, that is, fixed on the upper end side wall of the receiving tank, and then the heated and melted electrolyte salt is added to the receiving tank of the positive electrode current collector through the funnel, that is, the electrolyte salt melt is located between the mold and the positive electrode current collector, that is, the mold is located in the middle of the electrolyte salt melt, and the contact area with the electrolyte salt melt is large, and the electrolyte salt can be quickly cooled and molded, and then the mold is taken out for demolding, and a solidified electrolyte can be obtained. When the electrolyte salt melt is added through the funnel, there is no electrolyte splashing, and the shape of the electrolyte after being molded by the mold meets the adaptation of the negative electrode current collector, and there is no interference with the assembly of the negative electrode current collector. And after the electrolyte is molded, the negative electrode metal of the negative electrode current collector will not contact the high-temperature liquid electrolyte and melt and flow out during the subsequent assembly process, and the battery stability is high. After the electrolyte is formed, it can be assembled with the negative electrode current collector at any time without being restricted by the forming time of the electrolyte salt melt. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a liquid metal battery electrolyte salt forming device provided by the utility model;

[0020] Figure 2 yes Figure 1 Schematic cross-sectional view of ;

[0021] Figure 3 yes Figure 2 A magnified schematic diagram of part A in FIG.

[0022] In the figure: 1. positive electrode current collector; 11. receiving groove; 2. mold; 3. hanging ear; 4. funnel; 5. overlapping surface; 6. handle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the implementation mode of the utility model will be further described below in conjunction with the accompanying drawings.

[0024] Please refer to Figure 1-Figure 3 As shown, an embodiment of the utility model provides a liquid metal battery electrolyte salt molding device, comprising a positive electrode current collector 1, a mold 2, at least two hanging ears 3 and a funnel 4. The positive electrode current collector 1 is provided with a receiving groove 11 with an upper opening, and the receiving groove 11 is used to contain the electrolyte salt melt; the mold 2 is arranged in the receiving groove 11; at least two hanging ears 3 are fixed at intervals on the outer edge of the upper end of the mold 2, and are used to be fixed with the upper end of the positive electrode current collector 1; the funnel 4 is fixed on the outside of the mold 2, and the outlet of the funnel 4 is located between the outer side wall of the mold 2 and the inner side wall of the receiving groove 11, and the funnel 4 is used to fill the electrolyte salt melt.

[0025] The liquid metal battery electrolyte salt molding device of the present application is applied to form an alloy in a graphite crucible. After placing the graphite crucible in a battery shell of a size matching therewith, the mold 2 is placed in the receiving groove 11 of the positive electrode collector 1, and the mold 2 is fixed to the upper end of the positive electrode collector 1 by the hanging ear 3, that is, fixed on the upper end side wall of the receiving groove 11, and then the heated and melted electrolyte salt is added to the receiving groove 11 of the positive electrode collector 1 through the funnel 4, that is, the electrolyte salt melt is located between the mold 2 and the positive electrode collector 1, that is, the mold 2 is located in the middle of the electrolyte salt melt, and the contact area with the electrolyte salt melt is large, and the electrolyte salt can be quickly cooled and formed, and then the mold 2 is taken out for demoulding, and a solidified electrolyte can be obtained. There is no electrolyte splashing when the electrolyte salt melt is added through the funnel 4. The electrolyte after molding by the mold 2 has a regular shape and will not interfere with the assembly of the negative electrode collector. And after the electrolyte is molded, the negative electrode metal of the negative electrode collector will not contact the high-temperature liquid electrolyte and melt and flow out during the subsequent assembly process, and the battery stability is high. After the electrolyte is formed, it can be assembled with the negative electrode current collector at any time without being restricted by the forming time of the electrolyte salt melt.

[0026] Furthermore, the mold 2 is hollow and is used to be filled with a coolant. By filling the mold 2 with a coolant, the forming of the electrolyte salt melt can be further accelerated.

[0027] Specifically, the upper end of the inner side wall of the receiving tank 11 is concavely provided with a lap surface 5, and the lap surface 5 is used to receive the hanging ear 3. By providing the lap surface 5 at the upper end of the inner side wall of the receiving tank 11, it is convenient to overlap the hanging ear 3. On the one hand, the mold 2 does not fall to the bottom of the receiving tank 11 under its own weight, and a gap is formed between the mold 2 and the receiving tank 11, so that an electrolyte molding space is formed between the bottom of the mold 2 and the ground of the receiving tank 11; on the other hand, it is also convenient to remove the mold 2 by moving away from the hanging ear 3 and the lap surface 5 after the electrolyte is molded.

[0028] Furthermore, a plurality of positioning grooves are recessed downward on the upper end surface of the side wall of the accommodating groove 11 , and the plurality of positioning grooves correspond to the hanging ears 3 one by one.

[0029] A positioning groove is provided to position the hanging ear 3, thereby positioning the mold 2. Especially when the mold 2 is of an irregular shape, the hanging ear 3 is positioned through the positioning groove, and the bottom wall of the positioning groove provides a lap surface 5 for the hanging ear 3 to fix it to the positive electrode collector 1, which is convenient for installation.

[0030] Specifically, the top surface of the hanging ear 3 is not lower than the top surface of the positive electrode current collector 1. Since the top surface of the hanging ear 3 is not lower than the top surface of the positive electrode current collector 1, it is convenient to remove the hanging ear 3 and the mold 2 after the electrolyte is formed. In addition, the top surface of the mold 2 is also not lower than the top surface of the positive electrode current collector 1, so as to prevent the electrolyte salt melt from exceeding the top surface of the mold 2, affecting the amount of electrolyte salt melt and demolding.

[0031] Furthermore, the mold 2 is adapted to the shape of the positive electrode current collector 1. By adapting the shape of the mold 2 to the positive electrode current collector 1, it is convenient to form an electrolyte adapted thereto.

[0032] Preferably, in this embodiment, the positive electrode current collector 1 and the mold 2 are both cylindrical. Here, the shape of the mold 2 is not limited, and the mold 2 can also be other shapes according to actual installation requirements.

[0033] Preferably, the funnel 4 is made of graphite or stainless steel.

[0034] Specifically, a handle 6 is fixed on the top of the mold 2, and the handle 6 is convenient for demoulding after the electrolyte is formed.

[0035] Specifically, one end of the hanging ear 3 is welded to the outer edge of the upper end of the mold 2. The hanging ear 3 is welded to the mold 2, which, on the one hand, makes the connection more stable, and on the other hand, the welded connection will not affect the electrolyte molding and will not be occupied by other connection parts.

[0036] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0037] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid metal battery electrolyte salt forming device, characterized in that: include: A positive electrode current collector is provided with a receiving tank with an upper opening, wherein the receiving tank is used to contain an electrolyte salt melt; A mold, disposed in the receiving tank; At least two hanging ears are fixed at intervals on the outer edge of the upper end of the mold, and are used to be fixed to the upper end of the positive electrode current collector; and A funnel is fixed on the outside of the mold, an outlet of the funnel is located between the outer wall of the mold and the inner wall of the containing tank, and the funnel is used to fill the electrolyte salt melt.

2. The liquid metal battery electrolyte salt forming device according to claim 1, characterized in that: The mold is hollow and is used to be filled with cooling liquid.

3. The liquid metal battery electrolyte salt forming device according to claim 1, characterized in that: An upper end of the inner side wall of the receiving groove is concavely provided with an overlap surface, and the overlap surface is used to receive the hanging ear.

4. The liquid metal battery electrolyte salt forming device according to claim 1, characterized in that: The upper end surface of the side wall of the accommodating groove is concave downwardly provided with a plurality of positioning grooves, and the plurality of positioning grooves correspond to the hanging ears one by one.

5. The liquid metal battery electrolyte salt forming device according to claim 1, characterized in that: The top surface of the hanging ear is not lower than the top surface of the positive electrode current collector.

6. The liquid metal battery electrolyte salt forming device according to claim 1, characterized in that: The mold and the positive electrode current collector are adapted in shape.

7. The liquid metal battery electrolyte salt forming device according to claim 1, characterized in that: The funnel is made of graphite or stainless steel.

8. The liquid metal battery electrolyte salt forming device according to claim 1, characterized in that: A handle is fixed above the mold.

9. The liquid metal battery electrolyte salt forming device according to claim 1, characterized in that: One end of the hanging ear is welded and fixed to the outer edge of the upper end of the mold.

Images